91699079 has 2 divisors, whose sum is σ = 91699080. Its totient is φ = 91699078.

The previous prime is 91699067. The next prime is 91699087. The reversal of 91699079 is 97099619.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91699079 - 2¹⁶ = 91633543 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91699879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45849539 + 45849540.

It is an arithmetic number, because the mean of its divisors is an integer number (45849540).

Almost surely, 2^91699079 is an apocalyptic number.

91699079 is a deficient number, since it is larger than the sum of its proper divisors (1).

91699079 is an equidigital number, since it uses as much as digits as its factorization.

91699079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 275562, while the sum is 50.

The square root of 91699079 is about 9575.9636068648. The cubic root of 91699079 is about 450.9430084834.

The spelling of 91699079 in words is "ninety-one million, six hundred ninety-nine thousand, seventy-nine".